Visitors arrive at a giant hangar housing the Tropical Islands indoor resort on Feb. 15 in Krausnick, Germany. Located on a former Soviet-era military air base, the resort is built inside a hangar once used for airships. Sean Gallup, Getty Images

People enjoy the beach at the Tropical Islands indoor resort. The hangar is 1,181 feet long, 688 feet wide and 351 feet high, tall enough to house the Statue of Liberty. Sean Gallup, Getty Images

Guests take an ice cream break near the lagoon.The resort opened in 2004 and features a tropical setting complete with exotic flora and fauna, a beach, lagoon, restaurants, water slide, evening shows, adventure park and overnights stays ranging from rudimentary to the luxurious. Sean Gallup, Getty Images

Visitors lounge at the South Sea beach. Sean Gallup, Getty Images

People enjoy the tropical foliage. Sean Gallup, Getty Images

People swim in the lagoon and small pools. Sean Gallup, Getty Images

A guest looks at a display of tropical insects and spiders. Sean Gallup, Getty Images

People walk past a guest cottage. Sean Gallup, Getty Images

Visitors swim in the lagoon. Sean Gallup, Getty Images

People swim in the lagoon. Sean Gallup, Getty Images

A girl watches flamingos. Sean Gallup, Getty Images

Visitors zip down the water slide at the Tropical Islands indoor resort. Sean Gallup, Getty Images

A hot air balloon passes over people on the South Sea beach. Sean Gallup, Getty Images

Lights are turned down to simulate evening at the South Sea beach. Sean Gallup, Getty Images